215887130 has 8 divisors (see below), whose sum is σ = 388596852. Its totient is φ = 86354848.

The previous prime is 215887129. The next prime is 215887141. The reversal of 215887130 is 31788512.

It can be written as a sum of positive squares in 2 ways, for example, as 215766721 + 120409 = 14689^2 + 347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10794347 + ... + 10794366.

Almost surely, 2^215887130 is an apocalyptic number.

215887130 is a deficient number, since it is larger than the sum of its proper divisors (172709722).

215887130 is a wasteful number, since it uses less digits than its factorization.

215887130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21588720.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 215887130 is about 14693.0980395559. The cubic root of 215887130 is about 599.8954725318.

The spelling of 215887130 in words is "two hundred fifteen million, eight hundred eighty-seven thousand, one hundred thirty".